Where are the greenest mortuaries?

I would like an energy efficient funeral, biodegradeable coffin, a horse-drawn carriage. no electicity and just candles, public tranportation is provided to all funeral-goers. and no walking on the gr or any extra carbon footprints when they get there. Or where is there a non-green place like Vegas where the guests can have fun before and afterwards, without really destroying the planet on my behalf.